[Housekeeping] Move file IO to slow pool.

content/browser/webui/url_data_manager_backend.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/webui/url_data_manager_backend.h"
 
 #include <set>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 408 matching lines @@
   DCHECK(data_);
   CHECK(buf->data());
 
   int remaining = data_->size() - data_offset_;
   if (buf_size > remaining)
     buf_size = remaining;
 
   if (buf_size == 0)
     return 0;
 
-  base::WorkerPool::GetTaskRunner(false)->PostTaskAndReply(
+  base::WorkerPool::GetTaskRunner(true)->PostTaskAndReply(
       FROM_HERE, base::Bind(&CopyData, base::RetainedRef(buf), buf_size, data_,
                             data_offset_),
       base::Bind(&URLRequestChromeJob::ReadRawDataComplete, AsWeakPtr(),
                  buf_size));
   data_offset_ += buf_size;
 
   return net::ERR_IO_PENDING;
 }
 
 void URLRequestChromeJob::DelayStartForDevTools(
@@ skipping 379 matching lines @@
 
 }  // namespace
 
 net::URLRequestJobFactory::ProtocolHandler*
 CreateDevToolsProtocolHandler(content::ResourceContext* resource_context,
                               bool is_incognito) {
   return new DevToolsJobFactory(resource_context, is_incognito);
 }
 
 }  // namespace content